You’ll find few liberal’s in the oil business, it’s not a liberal friendly environment.
There are a lot more of them than you think. As these big refineries, drilling companies etc embrace the government required diversity in the workplace initiatives, you find more and more liberals in the workplace. I thought the same way you do until I went to work in a refinery for one of the big oil companies. I quickly learned that a good quarter of the people that I work with lean left, some way to the left.